Fashion icon Serena Williams blessed her 12.7 million Instagram followers with yet another fierce workout photo. The 23-time major champion donned an icy-blue Nike set with a pair of black Nike Air Max kicks.

On the ATP side, Stan Wawrinka is looking for a hitting partner Down Under. The world No. 18 posted the caption: "Anyone for tennis?" So far, Wawrinka has garnered over 50 responses in the comments section.

These are the Top 5 Photos from Thursday:

1

Serena Williams

Top 5 Photos 1/21: 
Serena slays in 
Nike gym attire

Top 5 Photos 1/21: Serena slays in Nike gym attire

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Serena Williams Instagram

2

Victoria Azarenka

Top 5 Photos 1/21: 
Serena slays in 
Nike gym attire

Top 5 Photos 1/21: Serena slays in Nike gym attire

Victoria Azarenka Instagram

3

Dominic Thiem

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Top 5 Photos 1/21: 
Serena slays in 
Nike gym attire

Top 5 Photos 1/21: Serena slays in Nike gym attire

Dominic Thiem Instagram

4

Stan Wawrinka

Top 5 Photos 1/21: 
Serena slays in 
Nike gym attire

Top 5 Photos 1/21: Serena slays in Nike gym attire

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Stan Wawrinka Instagram

5

Alex de Minaur

Top 5 Photos 1/21: 
Serena slays in 
Nike gym attire

Top 5 Photos 1/21: Serena slays in Nike gym attire

Alex de Minaur Instagram